Create ubuntu.yml (#20)

.github/workflows/ubuntu.yml

@@ -0,0 +1,22 @@
+# This workflow will build a Swift project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-swift
+
+name: Ubuntu
+
+on:
+  push:
+    branches: ["**"]
+
+jobs:
+  build:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - uses: sersoft-gmbh/swifty-linux-action@v3
+        with:
+          release-version: 6.0
+      - uses: actions/checkout@v3
+      - name: Build for release
+        run: swift build -v -c release
+      - name: Test
+        run: swift test -v